CN113862568A - 煤矿勘探放水用无缝钢管及制造方法 - Google Patents
煤矿勘探放水用无缝钢管及制造方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000003245 coal Substances 0.000 title claims abstract description 22
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- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000005096 rolling process Methods 0.000 claims abstract description 28
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- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 8
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 238000009628 steelmaking Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 4
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- 238000009749 continuous casting Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 14
- 238000010791 quenching Methods 0.000 claims description 11
- 230000000171 quenching effect Effects 0.000 claims description 11
- 238000005496 tempering Methods 0.000 claims description 11
- 238000005266 casting Methods 0.000 abstract description 8
- 238000007670 refining Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 10
- 239000011575 calcium Substances 0.000 description 7
- 239000004615 ingredient Substances 0.000 description 6
- NCJRLCWABWKAGX-UHFFFAOYSA-N [Si].[Ca].[Ba] Chemical compound [Si].[Ca].[Ba] NCJRLCWABWKAGX-UHFFFAOYSA-N 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 description 5
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 5
- 238000010079 rubber tapping Methods 0.000 description 5
- 238000009849 vacuum degassing Methods 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 4
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- 230000007547 defect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 229910052569 sulfide mineral Inorganic materials 0.000 description 1
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Abstract
本发明涉及煤矿勘探放水用无缝钢管,无缝钢管的钢种组成元素的重量配比为:C:0.24~0.35%,Si:0.17~0.57%,Mn:0.50~1.35%,P≤0.015%,S≤0.005%,Cr:0.85~1.70%,Mo:0.35~0.85%,Nb:0.01~0.1%,V:0.03~0.12%,Cu:0.15~0.40%,Ni≤0.25%,Al:0.02~0.05%,Ca:0.0015~0.005%,其余为铁,杂质元素微量。煤矿勘探放水用无缝钢管的制备方法,配料后进行冶炼,炼钢后进行连铸;轧制;对钢管进行热处理,空冷。本发明的无缝钢管的性能完全满煤矿地质勘探放水对钢质无缝钢管性能的要求。
Description
技术领域
本发明属于冶金工业无缝钢管制造技术领域,尤其涉及煤矿勘探放水用无缝钢管及制造方法。
背景技术
在煤炭开采过程中,煤层、围岩中的硫化物矿物与氧气和水接触,在微生物的催化作用下,经过一系列复杂的地球化学反应,能够产生酸性矿井水,由于酸性矿井水会对矿业生产、生态环境造成严重危害,需要对酸性矿井水进行处理,但是,在煤矿勘探抽排酸性排矿井水时采用不锈钢无缝管价格高昂,而普通钢管使用寿命太短。
因此,针对现有无缝钢管在煤矿地质勘探水使用等方面存在的不足,本发明的目的是提供一种煤矿勘探放水用无缝钢管及制造方法,以满足勘探抽排矿井水对无缝钢管的要求。
发明内容
本发明的目的在于克服现有技术的不足,提供一种煤矿勘探放水用无缝钢管及制造方法,以满足勘探抽排矿井水对无缝钢管的要求。
本发明解决其技术问题是采取以下技术方案实现的:
煤矿勘探放水用无缝钢管,所述无缝钢管的钢种组成元素的重量配比为:C:0.24~0.35%,Si:0.17~0.57%,Mn:0.50~1.35%,P≤0.015%,S≤0.005%,Cr:0.85~1.70%,Mo:0.35~0.85%,Nb:0.01~0.1%,V:0.03~0.12%,Cu:0.15~0.40%,Ni≤0.25%,Al:0.02~0.05%,Ca:0.0015~0.005%,其余为铁,杂质元素微量。
进一步的,所述无缝钢管的室温力学性指标如下:
屈服强度≥655MPa;抗拉强度≥725MPa;延伸率≥20%;室温冲击功:60J;维氏硬度<25HRC;晶粒度不小于6级。
煤矿勘探放水用无缝钢管的制备方法,包括如下步骤:
配料后进行冶炼,炼钢后进行连铸;
轧制:对连铸坯进行加热,炉温为1250~1300℃,穿孔温度为1200~1250℃,终轧温度800~890℃;
对钢管进行热处理,淬火前加热温度控制在870℃~930℃,回火温度控制在680℃~710℃,空冷。
进一步的,对于直径小于等于457mm的钢管,采用PQF热连轧机组轧制;对于直径大于457mm的钢管,采用PQF热连轧和720斜轧扩径轧管机组轧制。
本发明的优点和积极效果是:
本发明提供的煤矿勘探放水用无缝钢管及制造方法,利用该方法生产的无缝钢管的性能完全满煤矿地质勘探放水对钢质无缝钢管性能的要求。
具体实施方式
首先,需要说明的是,以下将以示例方式来具体说明本发明的具体结构、特点和优点等,然而所有的描述仅是用来进行说明的,而不应将其理解为对本发明形成任何限制。此外,在本文所提及各实施例中予以描述或隐含的任意单个技术特征,仍然可在这些技术特征(或其等同物)之间继续进行任意组合或删减,从而获得可能未在本文中直接提及的本发明的更多其他实施例。
需要说明的是,在不冲突的情况下,本申请中的实施例及实施例中的特征可以相互组合。
实施例1
本发明提供了煤矿勘探放水用无缝钢管,所述无缝钢管的钢种组成元素的重量配比为:C:0.24~0.35%,Si:0.17~0.57%,Mn:0.50~1.35%,P≤0.015%,S≤0.005%,Cr:0.85~1.70%,Mo:0.35~0.85%,Nb:0.01~0.1%,V:0.03~0.12%,Cu:0.15~0.40%,Ni≤0.25%,Al:0.02~0.05%,Ca:0.0015~0.005%,其余为铁,杂质元素微量。
所述无缝钢管的室温力学性指标如下:
屈服强度≥655MPa;抗拉强度≥725MPa;延伸率≥20%;室温冲击功:60J;维氏硬度<25HRC;晶粒度不小于6级。
煤矿勘探放水用无缝钢管的制备方法,包括如下步骤:
配料后经电炉或转炉炼钢,出钢过程中加入硅钙钡和铝铁进行脱氧处理,钢水进行LF精,精炼喂硅钙丝,不喂铝丝,精炼完后的钢水经过VD真空除气,Ca处理,随后上连铸平台进行连铸;
轧制:对连铸坯进行加热,炉温为1250~1300℃,穿孔温度为1200~1250℃,终轧温度800~890℃,锯切;
对于直径小于等于φ457mm的钢管,采用PQF热连轧机组轧制;对于直径大于φ457mm的钢管,采用PQF热连轧+720斜轧扩径轧管机组轧制。
对钢管进行淬火+回火热处理,淬火前加热温度控制在870℃~930℃,回火温度控制在680℃~710℃,空冷。
实施例2
制备Φ159*10mm无缝钢管:
配料冶炼、连铸,其中,实际控制合金成分如下表1所示(需要说明的是,成分表为两组样品的分析结果);
配料后经电炉或转炉炼钢,出钢过程中加入硅钙钡和铝铁进行脱氧处理;钢水进行LF精,精炼喂硅钙丝,不喂铝丝;精炼完后的钢水经过VD真空除气,Ca处理;随后上连铸平台进行连铸;连铸圆坯直径Φ210mm;
表1化学成分
轧制
检验合格后的定尺连铸坯在环形加热炉内加热,加热炉炉温控制为1270℃,穿孔温度控制为1220℃,终轧温度850℃,然后冷床冷却,锯切。
热处理
为达到所需要的机械性能,钢管需要进行淬火+回火热处理。淬火前加热温度控制在880℃,冷却介质为水,回火温度控制在690℃,空冷。室温力学性能如表2所示(需要说明的是,成品性能为两组样品的分析结果)。
表2Φ159*10mm成品性能
实施例3
制备Φ114*10mm无缝钢管
配料冶炼、连铸;其中,实际控制合金成分如下表3所示(需要说明的是,成分表为两组样品的分析结果);
配料后经电炉或转炉炼钢,出钢过程中加入硅钙钡和铝铁进行脱氧处理。钢水进行LF精,精炼喂硅钙丝,不喂铝丝。精炼完后的钢水经过VD真空除气,Ca处理。随后上连铸平台进行连铸。连铸圆坯直径Φ210mm。
表3化学成分
轧制
检验合格后的定尺连铸坯在环形加热炉内加热,加热炉炉温控制为1280℃,穿孔温度控制为1230℃,终轧温度870℃,然后冷床冷却,锯切;
热处理
为达到所需要的机械性能,钢管需要进行热水淬火+消除应力回火热处理。淬火前加热温度控制在890℃,冷却介质为水,回火温度控制在680℃,空冷;室温力学性能如表4所示(需要说明的是,成品性能为两组样品的分析结果)。
表4Φ114*10mm成品性能
实施例4
制备Φ168*10mm无缝钢管
配料冶炼、连铸;其中,实际控制合金成分如下表5所示(需要说明的是,成分表为两组样品的分析结果);
配料后经电炉或转炉炼钢,出钢过程中加入硅钙钡和铝铁进行脱氧处理。钢水进行LF精,精炼喂硅钙丝,不喂铝丝。精炼完后的钢水经过VD真空除气,Ca处理。随后上连铸平台进行连铸。连铸圆坯直径Φ210mm。
表5化学成分
轧制
检验合格后的定尺连铸坯在环形加热炉内加热,加热炉炉温控制为1280℃,穿孔温度控制为1230℃,终轧温度870℃,然后冷床冷却,锯切;
热处理
为达到所需要的机械性能,钢管需要进行热水淬火+消除应力回火热处理。淬火前加热温度控制在890℃,冷却介质为水,回火温度控制在680℃,空冷;室温力学性能如表6所示(需要说明的是,成品性能为两组样品的分析结果)。
表6Φ168*10mm成品性能
实施例5
制备Φ210*10mm无缝钢管
配料冶炼、连铸;其中,实际控制合金成分如下表7所示(需要说明的是,成分表为两组样品的分析结果);
配料后经电炉或转炉炼钢,出钢过程中加入硅钙钡和铝铁进行脱氧处理。钢水进行LF精,精炼喂硅钙丝,不喂铝丝。精炼完后的钢水经过VD真空除气,Ca处理。随后上连铸平台进行连铸。连铸圆坯直径Φ210mm。
表7化学成分
轧制
检验合格后的定尺连铸坯在环形加热炉内加热,加热炉炉温控制为1280℃,穿孔温度控制为1230℃,终轧温度870℃,然后冷床冷却,锯切;
热处理
为达到所需要的机械性能,钢管需要进行热水淬火+消除应力回火热处理。淬火前加热温度控制在890℃,冷却介质为水,回火温度控制在680℃,空冷;室温力学性能如表8所示(需要说明的是,成品性能为两组样品的分析结果)。
表8Φ210*10mm成品性能
以上实施例对本发明进行了详细说明,但所述内容仅为本发明的较佳实施例,不能被认为用于限定本发明的实施范围。凡依本发明申请范围所作的均等变化与改进等,均应仍归属于本发明的专利涵盖范围之内。
Claims (4)
1.煤矿勘探放水用无缝钢管,其特征在于:所述无缝钢管的钢种组成元素的重量配比为:C:0.24~0.35%,Si:0.17~0.57%,Mn:0.50~1.35%,P≤0.015%,S≤0.005%,Cr:0.85~1.70%,Mo:0.35~0.85%,Nb:0.01~0.1%,V:0.03~0.12%,Cu:0.15~0.40%,Ni≤0.25%,Al:0.02~0.05%,Ca:0.0015~0.005%,其余为铁,杂质元素微量。
2.根据权利要求1所述的煤矿勘探放水用无缝钢管,其特征在于:所述无缝钢管的室温力学性指标如下:
屈服强度≥655MPa;抗拉强度≥725MPa;延伸率≥20%;室温冲击功:60J;维氏硬度<25HRC;晶粒度不小于6级。
3.煤矿勘探放水用无缝钢管的制备方法,其特征在于:包括如下步骤:
配料后进行冶炼,炼钢后进行连铸;
轧制:对连铸坯进行加热,炉温为1250~1300℃,穿孔温度为1200~1250℃,终轧温度800~890℃;
对钢管进行热处理,淬火前加热温度控制在870℃~930℃,回火温度控制在680℃~710℃,空冷。
4.根据权利要求3所述的煤矿勘探放水用无缝钢管的制备方法,其特征在于:对于直径小于等于457mm的钢管,采用PQF热连轧机组轧制;对于直径大于457mm的钢管,采用PQF热连轧和720斜轧扩径轧管机组轧制。
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